Аннотация:Robert Craigie1 and Frederic D. Bushman2 Molecular Virology Section, NIDDK, National Institutes of Health, Bethesda, Maryland 20892-0560 University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6076 Correspondence: bobc{at}helix.nih.gov; bushman{at}mail.med.upenn.edu
